[PR #9621/fb4f7248 backport][stable-8] keycloak_client: sanitize saml.encryption.private.key

[patchback]

This is a backport of PR #9621 as merged into main (fb4f724).

SUMMARY

The module sanitizes only saml.singning.private.key, but not saml.encryption.private.key.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

keycloak_client

ADDITIONAL INFORMATION

shortened output before PR:

{
  "attributes": {
    "saml.encrypt": "true",
    "saml.encryption.certificate": "MIICoTCCAYk [...] BDJpxpqdXeRw=",
    "saml.encryption.private.key": "MIIEpAIBA [...] FYUiJ8nmzMfZLGtMs3bAtDpg==",
    "saml.signing.certificate": "MIICoTC [...] RT9mk1UYNU=",
    "saml.signing.private.key": "no_log",
    "saml_force_name_id_format": "false"
  }
}

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